Light flasher for fork lift vehicles



April 1968 J. R. CURTIS, JR 3,381,287

LIGHT FLASHER FOR FORK LIFT VEHICLES Filed Oct. 22, 1965 Fig.2

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INVHNTOR.

John Curfis, J 'r.

United States Patent 3,381,287 LIGHT FLASHER FOR FURK LIFT VEHICLES John R. (funds, In, 329 W. 22nd St., Chester, Pa. 19013 Filed Oct. 22, 1965, Ser. No. 501,844 5 Claims. (Cl. 340-282) This invention relates to light flashing devices, and more particularly to safety light fiasher for fork lift vehicles.

It is therefore the main purpose of this invention to provide a safety light flasher for fork lift vehicles for warning people who are in the immediate area that the forks of the lift vehicle are in a elevated position.

Another object of this invention is to provide a safety light flasher for fork lift vehicle which is adapted to flash signal lights when the forks of the lift truck are in an elevated position.

Another object of the invention is to provide a safety light flasher for fork lift vehicle wherein the signal lamp is extinguished when the fork lifts are at their lowermost position.

A still further object of this invention is to provide a safety light flasher for fork lift vehicle which is adaptable to any known fork lift vehicle and is economical to manufacture.

Other objects and advantages of the invention will become apparent from a consideration of the following detailed description taken in connection with the accompanying drawing wherein a satisfactory embodiment of the invention is shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of the appended claims.

In the drawing:

FIGURE 1 is a rear view the channel members of a fork lift showing the inoperative use.

FIGURE 2 is a schematic wiring diagram of the invention.

According to this invention, a safety light flasher for fork lift vehicle is provided with signal lights 11 and 12 which at all times are facing the driver of the vehicle. Lights 11 and 12 are mounted on the outside channels 13 and 14 which, in turn, are adapted to vertically slide on inside channels 15 and 16. A roller type oif and on switch 17 is mounted on the upper-most portion of channel 13, in such a manner that roller head 18 is adapted to touch inside channel 15. Inside channels 15 and 16 are connected at their upper portions by a vertical beam 19. Lifter rod 20 is attached to the center portion of beam 19 and extends downwardly.

Looking now at FIGURE 1 of the drawing, one will see that when rod 20 rises, beam 18 inside channels 15 and 16 will be elevated thus activating the rollers 18 of the switch 17 and transmitting a signal to lights 12 and 11 which are adapted to operate the yellow flasher light.

3,381,287 Patented Apr. 313, 1958 This will provide a warning to the driver of the vehicle to exercise maximum caution.

What is claimed is:

1. A safety light flasher for fork lift vehicles comprising a plurality of signal lights, vertical outside channels upon which said signal lights are mounted, vertical inside channels adapted to slidingly position said outside channels, and switch means arranged to activate said lights when the forks of the vehicle are in an elevated position.

2. A safety light flasher for fork lift vehicles comprising a plurality of signal lights, vertical outside channels upon which said signal lights are mounted, vertical inside channels adapted to slidingly position said outside channels, switch means arranged to activate said lights when the forks of said vehicle are in an elevated position, and switch means being attached to the upper portion of one of said outside channels.

3. A safety light flasher for fork lift vehicles comprising a plurality of signal lights, vertical outside channels upon which said signal lights are mounted, vertical inside channels adapted to slidingly position said outside channels, switch means arranged to activate said lights when the forks of said vehicle are in an elevated position, said switch means being attached to the upper portion of one of said outside channels and said switch means including a roller head which is capable of making contact as soon as said inside channel starts moving into an elevated direction.

4. A safety light flasher for fork lift vehicles comprising a plurality of signal lights, vertical outside channels on which said signal lights are mounted, vertical inside channels adapted to slidingly position said outside channels, switch means arranged to activate said lights when the forks of said vehicle are in a elevated position, said lights being adapted to flash intermittently to warn the driver of said vehicle that said forks are in an elevated position.

5. A safety light flasher for fork lift vehicles comprising a plurality of signal lights, vertical outside channels upon which said signal lights are mounted, vertical inside channels adapted to slidingly position said outside channels. switch means arranged to activate said lights when the forks of said vehicle are in an elevated position, said lights being extinguished when said forks return to their original position.

References Cited UNITED STATES PATENTS 1,535,844 4/ 1925 McLemore. 2,634,405 4/ 1953 Stone et al 34021 X 2,767,394 10/1956 Arnot et al. 340-267 2,887,672 5/1959 Morano et al. 340-52 3,109,289 11/1963 Roussel 340-21 X 3,141,562 7/1964 McAdams.

JOHN W. CALDWELL, Primary Examiner.

D. L. TRAFTON, Assistant Examiner. 

1. A SAFETY LIGHT FLASHER FOR FORK LIFT VEHICLES COMPRISING A PLURALITY OF SIGNAL LIGHTS, VERTICAL OUTSIDE CHANNELS UPON WHICH SAID SIGNAL LIGHTS ARE MOUNTED, VERTICAL INSIDE CHANNELS ADAPTED TO SLIDINGLY POSITION SAID OUTSIDE CHANNELS, AND SWITCH MEANS ARRANGED TO ACTIVATE SAID LIGHTS WHEN THE FORKS OF THE VEHICLE ARE IN AN ELEVATED POSITION. 